Cheapest return AMS–BSL flights, September

AirHint found the following cheapest return flights from Amsterdam (AMS) to Basel (BSL) in September 2026 (see full year).

Return flights

08 Sep - 15 Sep KLM direct
03 Sep - 06 Sep KLM direct
20 Sep - 23 Sep KLM direct
27 Sep - 01 Oct KLM direct
08 Sep - 10 Sep Vueling Airlines
10 Sep - 15 Sep KLM direct
14 Sep - 18 Sep KLM direct
11 Sep - 14 Sep KLM direct
08 Sep - 10 Sep KLM direct
14 Sep - 17 Sep KLM
14 Sep - 17 Sep KLM direct

Also check the deals for one-way flights from Amsterdam to Basel in September.

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